Regulations last checked for updates: May 18, 2024

Title 40 - Protection of Environment last revised: May 16, 2024
All TitlesTitle 40Chapter IPart 471Subpart A - Subpart A—Lead-Tin-Bismuth Forming Subcategory
View all text of Subpart A [§ 471.10 - § 471.16]
§ 471.11 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).

Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations for the process operations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT):

(a) Rolling spent emulsions.

Subpart A—BPT

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/off-kg (pounds per million off-pounds) of lead-tin-bismuth rolled with emulsions
Antimony0.0680.030
Lead0.0100.005
Oil and grease0.4680.281
TSS0.9600.457
pH( 1)

1 Within the range of 7.5 to 10.0 at all times.

(b) Rolling spent soap solutions.

Subpart A—BPT

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/off-kg (pounds per million off-pound) of lead-tin-bismuth rolled with soap solutions
Antimony0.1250.055
Lead0.0190.009
Oil and grease0.8600.520
TSS1.800.840
pH( 1)

1 Within the range of 7.5 to 10.0 at all times.

(c) Drawing spent neat oils—subpart A—BPT. There shall be no discharge of process wastewater pollutants.

(d) Drawing spent emulsions.

Subpart A—BPT

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/off-kg (pounds per million off-pounds) of lead-tin-bismuth drawn with emulsions
Antimony0.0760.034
Lead0.0110.005
Oil and grease0.5260.316
TSS1.080.513
pH( 1)

1 Within the range of 7.5 to 10.0 at all times.

(e) Drawing spent soap solutions.

Subpart A—BPT

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/off-kg (pounds per million off-pounds) of lead-tin-bismuth drawn with soap solutions
Antimony0.0220.010
Lead0.0030.002
Oil and grease0.1490.090
TSS0.3060.146
pH( 1)

1 Within the range of 7.5 to 10.0 at all times.

(f) Extrusion press and solution heat treatment contact cooling water.

Subpart A—BPT

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/off-kg (pounds per million off-pounds of lead-tin-bismuth heat treated
Antimony4.141.850
Lead0.6050.288
Oil and grease28.8017.30
TSS59.1028.10
pH( 1)

1 Within the range of 7.5 to 10.0 at all times.

(g) Extrusion press hydraulic fluid leakage.

Subpart A—BPT

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/off-kg (pounds per million off-pounds) of lead-tin-bismuth extruded
Antimony0.1580.071
Lead0.0230.011
Oil and grease1.100.660
TSS2.261.07
pH( 1)

1 Within the range of 7.5 to 10.0 at all times.

(h) Continuous strip casting contact cooling water.

Subpart A—BPT

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/off-kg (pounds per million off-pounds) of lead-tin-bismuth cast by the continuous strip method
Antimony0.0030.001
Lead0.00040.0002
Oil and grease0.0200.012
TSS0.0410.020
pH( 1)

1 Within the range of 7.5 to 10.0 at all times.

(i) Semi-continuous ingot casting contact cooling water.

Subpart A—BPT

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/off-kg (pounds per million off-pounds) of lead-tin-bismuth ingot cast by the sem-continuous method
Antimony0.0850.038
Lead0.0130.006
Oil and grease0.5880.353
TSS1.210.574
pH( 1)

1 Within the range of 7.5 to 10.0 at all times.

(j) Shot casting contact cooling water.

Subpart A—BPT

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/off-kg (pounds per million off-pounds) of lead-tin-bismuth shot cast
Antimony0.1070.048
Lead0.0160.008
Oil and grease0.7460.448
TSS1.530.728
pH( 1)

1 Within the range of 7.5 to 10.0 at all times.

(k) Shot-forming wet air pollution control scrubber blowdown.

Subpart A—BPT

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/off-kg (pounds per million off-pounds) of lead-tin-bismuth shot formed
Antimony1.690.753
Lead0.2470.118
Oil and grease11.87.06
TSS24.111.5
pH( 1)

1 Within the range of 7.5 to 10.0 at all times.

(l) Alkaline cleaning spent baths.

Subpart A—BPT

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/off-kg (pounds per million off-pounds) of lead-tin-bismuth alkaline cleaned
Antimony0.3450.154
Lead0.0510.024
Oil and grease2.401.44
TSS4.922.34
pH( 1)

1 Within the range of 7.5 to 10.0 at all times.

(m) Alkaline cleaning rinse.

Subpart A—BPT

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/off-kg (pounds per million off-pounds) of lead-tin-bismuth alkaline cleaned
Antimony6.783.02
Lead0.9910.472
Oil and grease47.228.4
TSS96.846.0
pH( 1)

1 Within the range of 7.5 to 10.0 at all times.

(n) Swaging spent emulsions.

Subpart A—BPT

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/off-kg (pounds per million off-pounds) of lead-tin-bismuth swaged with emulsion
Antimony0.0050.002
Lead0.00070.0004
Oil and grease0.0360.022
TSS0.0730.034
pH( 1)

1 Within the range of 7.5 to 10.0 at all times.

(o) Degreasing spent solvents—subpart A—BPT. There shall be no discharge of process wastewater pollutants.

[50 FR 34270, Aug. 23, 1985; 51 FR 2884, Jan. 22, 1986]
authority: Secs. 301, 304(b), (c), (e), and (g), 306(b) and (c), 307, 308, and 501 of the Clean Water Act (the Federal Water Pollution Control Act Amendments of 1972 as amended by the Clean Water Act of 1977) (the “Act”); 33 U.S.C. 1311,1314,c,e,and, 1316(b) andc,and; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217
source: 50 FR 34270, Aug. 23, 1985, unless otherwise noted.
cite as: 40 CFR 471.11
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